The flowers of Acrolophia micrantha grow in inflorescences of up to five-branched panicles, their erect, lax racemes up to 30 cm long, bearing many small flowers. The specific epithet, micrantha, means small flowers (micro is small, anthos flower in Greek). A short, narrow bract, less than half the length of the pedicel, subtends each flower.
The flower of this Acrolophia is resupinate, i.e. twisted through 180˚ before opening to position the lip at the bottom, the median sepal at the top. Flower diameter is about 7 mm, the pedicel and ovary combined about 1 cm long.
The sepals and lateral petals are purplish green or brown, the three-lobed lip white with red-purple lines transversal across the two side-lobes. The square to obovate central lobe of the lip has three rows of erect papillae or fleshy, nipple-like outgrowths across its surface.
Flowering happens from late winter to early summer (Liltved and Johnson, 2012).
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